Conditional Sidebar – If Author Is

Hi,

ok – im a bit of a novice, and i could really do with some help. There is a requirement in my blog to make the sidebar conditional based on the author – im trying to use

<?php
// let’s generate info appropriate to the author being displayed
if (is_author(‘Jo’)) {
// do this
} elseif (is_author(‘Jack’)) {
// do this
} elseif (is_author(‘Jim’)) {
// do this
}
?>

but this plainly doesnt work. I have read every post in this forum – some seem to say its not possible, others seem to say it is but i havent been able to get any of them to work.

Creative work arounds to achieve the same result would also be really welcomed.

thanks so much for your help

D